DNS-based email trust signals

Email Authentication Checker

Check public SPF, DMARC, optional DKIM, and MX signals for a domain and learn what they mean.

Email Header Inspector BEC Request Inspector Read the guide

This checker reads public DNS records only. It does not fetch websites, edit DNS, verify inbox delivery, or prove that every email from a domain is safe.

DomainDKIM selector, optional

DKIM records require a selector. If you do not know it, SPF, DMARC, and MX can still be checked.

Domain signals

Enter a domain to check public email authentication records.

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